One of my favourite things I've purchased lately is the Pat McGrath Divine Skin: 001 Essence. It only took me a couple of tries of the sample size to know I needed the full size in my collection! Apparently it's Naomi Campbell's secret to her perfect skin and just about everything you read describes it as "a breakthrough in skincare", with almond oil, squalene and rose extract.
I use this at the start of my skincare routine, after toner and before serum, to help add luminosity to my skin. It's really thin, with only a few drops needed. It's particularly useful in the winter where it's helping to deal with dryness and tone down my redness and rosacea without bothering my sensitive skin - despite the strong rosey scent.
Even through a full face of foundation, both liquid, powder and setting powder, it makes a huge difference to the glow of my skin which is a big deal for me as I've always been a big fan of matte makeup. Pat McGrath uses it as a primer in her social media posts, and although I still team mine with a primer, I've noticed a huge difference in makeup not settling so much under eye and "eleven lines" which are a BIG problem as I work in front of a computer all day and frown a lot!!! My makeup sits a lot better throughout the day and whilst it was going to be a "special occasions" product, I couldn't be without it now 💗